Sökning: "facies indicators"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden facies indicators.

1. 1. Defining The Geochemical Footprint For Gold Mineralisation Around Birthday Reef.Reefton Goldfield, New Zealand

   Master-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

   Författare :Jonathan Hamisi; [2016]
   Nyckelord :Orogenic gold; hydrothermal alteration; Reefton; mass changes; geochemical footprint; vectors; exploration; Blackwater;

   Sammanfattning : Abstract Orogenic gold deposits from the Reefton goldfield in New Zealand hosted in Ordovician metasediments of the Greenland group have produce 67 tons of gold before 1951. The Blackwater mine in Waiuta account for about 1/3 of the gold production at Reefton prior 1951. LÄS MER

3. 2. The Säm fold structure : characterization of folding and metamorphism in a part of the eclogite–granulite region, Sveconorwegian orogen

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Stephen Michalchuk; [2013]
   Nyckelord :anatexis; high-T granulite; interference folds; polydeformation; Sveconorwegian orogen; SW Sweden; Earth and Environmental Sciences;

   Sammanfattning : Structural and petrological studies on complexly folded mafic and felsic layered sequences have been mapped in the parautochthonous basement of the Sveconorwegian Province, Sweden. Three deformation phases (D1, D2, D3)involving at least two fold phases (F2, F3) and two lineation phases (L2, L3) characterize a polyphase fold, which is primarily defined by a migmatized and highly competent garnet amphibolite. LÄS MER

4. 3. An interpretation of oncoid mass-occurrence during the Late Silurian Lau Event, Gotland, Sweden

   Kandidat-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Martin Qvarnström; [2012]
   Nyckelord :Bjärsjölagård; Gotland; microbialites; Silurian; Oncoids; Lau Event; ecological crisis; Onkoider; Silur; microbialiter; ekologisk kris; Earth and Environmental Sciences;

   Sammanfattning : The geological significance of the microbial-formed oncoid is not as well understood as the recognized, analogous stromatolite but can, as well be used as an environmental indicator. In association with the larger Phanerozoic mass extinctions, a resurgence of microbialites as a disaster fauna is at present an accepted view. LÄS MER

5. 4. Maturity of kerogen, petroleum generation and the application of fossils and organic matter for paleotemperature measurements

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Yaser Abdullah Abdullah Al-Mashramah; [2011]
   Nyckelord :thermal alteration; thermal maturation; kerogen; petroleum generation; paleothermometres; vitrinite; conodonts; graptolites; palynomorphs; Earth and Environmental Sciences;

   Sammanfattning : The origin, composition and maturity of kerogen, and its conversion to petroleum is reviewed. Various methods for estimating the maximum temperature to which kerogen and potential source rocks were subjected are also reviewed. LÄS MER

7. 5. Beach processes and recent sea-level changes at Tönsneset, Kongsfjorden, northwestern Spitsbergen

   Kandidat-uppsats, Institutionen för naturgeografi och kvartärgeologi (INK)

   Författare :Jonas Svensson; [2010]
   Nyckelord :;

   Sammanfattning : Beaches occur throughout the coastal regions of the world. Ridges found on beachescan be used as indicators of past climatic and oceanographic conditions. Sea-levelchanges can also be extrapolated from these landforms, if the correct conditions occur, when the facies between eolian and intertidal sediments can be found. LÄS MER